* {
  margin: 0;
  padding: 0;
}

.container {
  margin: 20px;
}

.container .time-line {
  position: relative;
  width: 0;
  border-right: 1px gray dashed;
}

.container .square {
  position: absolute;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  background-color: gray;
}

.container .square .time {
  position: absolute;
  width: 300px;
  height: 30px;
  margin-top: -10px;
  margin-left: 20px;
  line-height: 30px;
}

.container .square .content {
  position: absolute;
  width: 300px;
  height: 60px;
  margin-top: 20px;
  margin-left: 20px;
  line-height: 60px;
}

